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Microstructure and property of friction stir welding joint of 7075Al and AZ31BMg |
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| Authors: | Da Li Zhan-quan Cui Qing-xiang Yang Bing Sun Ming-hui Sun |
| Affiliation: | 1. School of Material Sciences and Engineering, Southwest Jiaotong University, Chengdu, 610031, China 2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, Hebei, China |
| Abstract: | Microstructure and forming quality of friction stir welding joints of 7075Al and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequency is 13 r/s and the welding speed is 30 mm/min. An irregular area is formed in the welding center. Meanwhile, the river pattern and eddy-like distribution are found in the weld nugget zone. Besides, brittle intermetallic compounds Al12Mg17 and Al3Mg2 are found in the welded joint. They cause the increase of microhardness of welded joint. The maximum tension stress of welded joint is 112MPa. |
| Keywords: | friction stir welding aluminum alloy magnesium alloy microstructure tension stress |
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